| I. Ozone contributes to 3-7% of Greenhouse effect |
| II. The largest net source of tropospheric ozone is influx from the stratosphere |
| III. Large amounts of ozone are also produced in the troposphere by photochemical reactions, the amounts increasing with high levels of air pollution. |
A) I & II
B) II & III
C) Only III
D) All the above
Correct Answer: D
Solution :
Ozone contributes to 3-7% of Greenhouse effect. The largest net source of tropospheric ozone is influx from the stratosphere. Large amounts of ozone are also produced in the troposphere by photochemical reactions, the amounts increasing with high levels of air pollution.
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